EXHIBIT 21
LIST OF SIGNIFICANT SUBSIDIARIES
JURISDICTION OF INCORPORATION
 
 
Dyn Specialty Contracting, Inc.
Virginia
MES Holdings Corporation
Delaware
EMCOR Construction Services, Inc.
Delaware
EMCOR International, Inc.
Delaware
EMCOR Mechanical/Electrical Services (East), Inc.
Delaware
EMCOR (UK) Limited
England
EMCOR Group (UK) plc
England
EMCOR Facilities Services, Inc.
Ohio
EMCOR-CSI Holding Co.
Delaware
FR X Ohmstede Acquisitions Co.
Delaware
RepconStrickland, Inc.
Delaware